WASHINGTON — Spilling out wrenching tales of lost lives and stolen security, students and parents appealed to President Donald Trump on Wednesday to set politics aside and protect America's school children from the scourge of gun violence. Trump listened intently to the raw emotion and pledged action, including the possibility of arming teachers.

"I turned 18 the day after" the shooting, said a tearful Samuel Zeif, a student at the Florida high school where a former student's assault left 17 dead last week. "Woke up to the news that my best friend was gone. And I don't understand why I can still go in a store and buy a weapon of war. An AR. How is it that easy to buy this type of weapon? How do we not stop this after Columbine? After Sandy Hook?"

Trump promised to be "very strong on background checks." And he suggested he supported allowing some teachers and other school employees to carry concealed weapons to be ready for intruders. But largely he listened, holding handwritten notes bearing his message to the families. "I hear you" was written in black marker.

The president had invited the teen survivors of school violence and parents of murdered children in a show of his resolve against gun violence in the wake of last week's shootings at Marjory Stoneman Douglas High School in Parkland, Florida, and in past years at schools in Connecticut and Colorado. The latest episode has prompted a renewed and growing call for stronger gun control.

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Trump invited his guests to suggest solutions and solicited feedback. He did not fully endorse any specific policy solution, but pledged to take action and expressed interest in widely differing approaches.

Besides considering concealed carrying of weapons by trained school employees, a concept he has endorsed in the past, he said he planned to go "very strongly into age, age of purchase." And he said he was committed to improving background checks and working on mental health.

Most in the group were emotional but quiet and polite.

But Andrew Pollack, whose daughter Meadow was killed last week, noted the previous school massacres and raged over his loss, saying this moment isn't about gun laws but about fixing the schools.

"It should have been one school shooting and we should have fixed it and I'm pissed. Because my daughter, I'm not going to see again," said Pollack. "King David Cemetery, that is where I go to see my kid now."

A strong supporter of gun rights, Trump has nonetheless indicated in recent days that he is willing to consider ideas not in keeping with National Rifle Association orthodoxy, including age restrictions for buying assault-type weapons. Still, gun owners are a key part of his base of supporters.

The NRA quickly rejected any talk of raising the age for buying long guns to 21.

"Legislative proposals that prevent law-abiding adults aged 18-20 years old from acquiring rifles and shotguns effectively prohibits them for purchasing any firearm, thus depriving them of their constitutional right to self-protection," the group said in a statement.

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Several dozen people assembled in the White House State Dining Room. Among them were students from Parkland along with their parents. Also present were parents of students killed in massacres at Columbine High School in Littleton, Colorado, and Sandy Hook Elementary in Newtown, Connecticut. Students and parents from the Washington area also were present.

The student body president at the Parkland school, Julia Cordover, tearfully told Trump that she "was lucky enough to come home from school."

She added, "I am confident you will do the right thing."

Trump later tweeted that he would "always remember" the meeting. "So much love in the midst of so much pain. We must not let them down. We must keep our children safe!!"

Not all the students impacted by the shooting came to the White House.

David Hogg, who has been one of the students actively calling for gun control was invited but declined, said his mother Rebecca Boldrick.

"His point was (Trump needs) to come to Parkland, we're not going there," she said.

Inside the executive mansion, Trump said at the end of an hour listening to tales of pain and anguish, "Thank you for pouring out your hearts because the world is watching and we're going to come up with a solution."